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   "source": [
    "### Hadoop"
   ]
  },
  {
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   "metadata": {},
   "source": [
    "   1. Hadoop是一个分布式系统架构，实现了一个分布式文件系统\n",
    "   2. Hadoop会存储多个冗余的数据，确保节点失败后，可以重新分布处理\n",
    "   3. Hadoop是并行处理，在计算机集簇间分配数据并完成计算任务"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### MapReduce"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "   1. MapReduce包含Map函数，Reduce函数\n",
    "   2. Map函数主要处理Key，Reduce函数处理value"
   ]
  }
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